You could also have a male OC who is a prodigy in a non - assassination related field, like art or music, but is forced to be in the assassination classroom. His struggle between his passion for his art and his duty to assassinate Koro - sensei could be a central theme. He might find unique ways to use his artistic skills in the assassination attempts, like creating a musical distraction or using his painting skills to camouflage himself.
One idea could be an OC who has a unique ability related to stealth. For example, they can blend into the shadows like a chameleon. This OC could use this ability to get closer to Koro - sensei without being detected, adding a new dynamic to the assassination attempts. Another plot could involve an OC who is a transfer student from a different school with a completely different teaching style. They struggle to adapt to the chaos of Class 3 - E at first but eventually find their place and contribute to the assassination plans in their own way. Maybe an OC who is a master of disguise and uses it to trick Koro - sensei into various situations where they can try to attack him.
First, give your male OC a clear backstory. For instance, if he has a tragic past, like losing his family to an assassin, it can explain his motivation to be in the assassination classroom. Second, define his unique skills. It could be something physical like superhuman speed or a mental ability like mind - reading. This will make him stand out among the other characters.
She could have a secret power that only she discovers over time. For instance, the power to read Koro - sensei's thoughts briefly when she makes direct eye contact with him. This would give her an edge in the assassination attempts. She could then use this power to set up elaborate traps based on what she learns from his thoughts.
Well, you could write a fanfiction where the students develop new and unique assassination techniques. It could also be interesting to write about a time - travel plot, where a student goes back in time to change something that would affect the whole assassination classroom scenario. Or perhaps a story that focuses on the relationship between Koro - sensei and a particular student, like Nagisa, and how it develops in unexpected ways.
Some fanfictions might explore the concept of different teaching styles. In 'Assassination Classroom', the teacher is very unconventional. So in a fanfic with Harry, it could be about how the Hogwarts teachers would react to this new style of teaching and how the students like Harry would adapt to it.
One idea could be a gamer who gets transported into the 'Assassination Classroom' world and has to use their gaming skills to try and assassinate Koro - sensei. For example, they might analyze his movements like they would in a boss fight in a game.
Maybe some of the students from the Assassination Classroom end up in the Naruto world. They would be in for a shock with all the chakra and ninjutsu. They could learn from the ninja and apply their own assassination skills in a new context, like trying to 'assassinate' a powerful ninja for training purposes.
First, think about their backstory. Where did they come from? Were they bullied in their previous school? Or did they have a family tragedy that led them to Class 3 - E? This will shape their personality. For example, if they were bullied, they might be more reserved but also determined to prove themselves. Second, give them unique skills or talents. It doesn't have to be combat - related. It could be something like being really good at cooking, which can be used in a creative way in the story. Third, consider their relationships with other characters. Do they admire Nagisa? Or do they have a friendly rivalry with Karma?
The 'Assassination Classroom' is about a powerful octopus - like creature that destroys a large part of the moon and threatens to do the same to Earth. He becomes a teacher of a class of misfit students. The students are tasked with assassinating him within a year. As the story progresses, the students grow both in their assassination skills and as individuals. They form bonds with their strange teacher, who also teaches them valuable academic and life lessons.
A really interesting plot could be where the reader is from a different time period and gets transported into the 'Assassination Classroom' world. They then have to adapt to the strange situation of trying to assassinate a teacher while also dealing with the modern - day school life. This could lead to a lot of humorous and heartwarming moments as they interact with the characters.